CN111083614A

CN111083614A - Horn device

Info

Publication number: CN111083614A
Application number: CN201910080004.8A
Authority: CN
Inventors: 廖冠淳; 陈俊元; 郑志强; 黄教汎
Original assignee: Taiwan Luxshare Precision Ltd
Current assignee: Taiwan Luxshare Precision Ltd
Priority date: 2018-10-18
Filing date: 2019-01-28
Publication date: 2020-04-28
Anticipated expiration: 2039-01-28
Also published as: CN111083614B; TW202017394A; US20200128319A1; TWI707588B

Abstract

A speaker device includes a speaker box, a speaker unit, and a bass reinforcement unit. The sound box comprises an inner cavity, the volume of the inner cavity is between 0.5 ml and 1 ml, the sound box is provided with a cavity acoustic compliance value, and the cavity acoustic compliance value is the product of the volume of the cavity divided by the air density and the square of the sound velocity. The loudspeaker unit sets up in interior cavity, and the loudspeaker unit includes vibrating diaphragm and dangling limit, and the dangling limit encircles and sets up around the vibrating diaphragm, and the loudspeaker unit has loudspeaker acoustics compliance value and effective sound area, and loudspeaker acoustics compliance value is the product of the mechanical compliance value of dangling limit and effective sound area square, and wherein effective sound area is directly proportional to the area of vibrating diaphragm, and the ratio less than or equal to 1 of loudspeaker acoustics compliance value and cavity acoustics compliance value. The bass reinforcement unit is arranged in the inner cavity and outputs low-frequency response frequency according to the operation of the loudspeaker unit.

Description

Horn device

Technical Field

The present invention relates to an audio playing device, and more particularly, to a speaker device.

Background

A speaker (or called a loudspeaker) is a common sound playing device at present, and the function of the speaker is to convert an electrical signal into mechanical vibration of a diaphragm, so as to change the density of the surrounding air to generate sound for the surrounding people to listen to.

For some large-sized loudspeakers, in order to enhance the sound pressure in the low frequency band, a Bass enhancement device, such as a Bass reflex tube (Bass reflex) or a Passive Radiator (Passive Radiator), is generally added to the sound box to achieve the effect of enhancing the low frequency by utilizing the phase reversal characteristic.

With the development of light and thin electronic devices, many electronic devices (such as smart phones, tablet computers or notebook computers) have small internal space, so that the micro-speakers are mostly used to reduce the occupied volume and thickness. However, the volume of the speaker box of the micro-speaker is very small (mostly below 1 ml), and if the bass enhancing device is introduced, the effect of enhancing the low frequency cannot be normally exerted, but the original output performance of the speaker is reduced.

Disclosure of Invention

In view of the foregoing, in one embodiment, a speaker device includes a speaker box, a speaker unit, and a bass reinforcement unit. The sound box comprises an inner cavity, the volume of the inner cavity is between 0.5 ml and 1 ml, the sound box is provided with a cavity acoustic compliance value, and the cavity acoustic compliance value is the product of the volume of the cavity divided by the air density and the square of the sound velocity. The loudspeaker unit sets up in interior cavity, and the loudspeaker unit includes vibrating diaphragm and dangling limit, and the dangling limit encircles and sets up around the vibrating diaphragm, and the loudspeaker unit has loudspeaker acoustics compliance value and effective sound area, and loudspeaker acoustics compliance value is the product of the mechanical compliance value of dangling limit and effective sound area square, and wherein effective sound area is directly proportional to the area of vibrating diaphragm, and the ratio less than or equal to 1 of loudspeaker acoustics compliance value and cavity acoustics compliance value. The bass reinforcement unit is communicated with the inner cavity and outputs low-frequency response frequency according to the operation of the loudspeaker unit.

In an embodiment, the inner cavity includes a first cavity and a second cavity, the first cavity has a first sound outlet, the second cavity has a second sound outlet, the speaker unit corresponds to the first sound outlet, the bass reinforcement unit includes a bass reflex tube, and the bass reflex tube corresponds to the second sound outlet.

In one embodiment, the bass reinforcement unit includes a passive radiator including a driven diaphragm that vibrates in response to operation of the speaker unit.

In one embodiment, the mechanical compliance value of the overhang edge is between 0.12mm/N and 1.2 mm/N.

In one embodiment, the horn unit further has a vibration mass, the vibration mass is a sum of masses of at least one vibration member inside the horn unit, and the vibration mass is inversely proportional to the mechanical compliance value of the suspension edge to maintain the horn unit in a resonant frequency range.

In one embodiment, the at least one vibrating element includes the diaphragm and the suspension edge.

In one embodiment, the speaker unit includes a magnetic body and a voice coil, the voice coil is disposed adjacent to the magnetic body and includes a first set of coils and a second set of coils, and the first set of coils and the second set of coils are connected in parallel.

In one embodiment, a number of winding turns of the voice coil is inversely proportional to a coil cross-sectional area.

In one embodiment, the first set of coils surrounds the second set of coils.

In one embodiment, the first set of coils and the second set of coils are interwoven with each other.

In summary, in the horn device of the present invention, the ratio of the horn acoustic compliance value to the cavity acoustic compliance value is adjusted to be less than or equal to 1, so that when the bass reinforcement unit is introduced into the sound box with a small inner cavity (for example, an inner cavity with a cavity volume of 0.5 ml to 1 ml), the bass reinforcement unit is ensured to exert the function of enhancing the sound pressure of the low frequency band, thereby enhancing the output performance of the horn device.

Drawings

Fig. 1 is a schematic view of an application of a speaker device according to an embodiment of the present invention.

Fig. 2 is an exploded perspective view of an embodiment of the speaker device of the present invention.

Fig. 3 is a sectional view of an embodiment of the speaker device of the present invention.

Fig. 4 is an internal schematic view of a speaker device according to an embodiment of the present invention.

Fig. 5 is an internal schematic view of another embodiment of the speaker device of the present invention.

Fig. 6 is a sound pressure-frequency graph of an embodiment of the speaker device of the present invention.

Fig. 7 is a sectional view of an embodiment of the speaker unit of the present invention.

Fig. 8 is a partially enlarged view of fig. 7.

Fig. 9 is a schematic view of a voice coil of a speaker unit according to an embodiment of the present invention.

Fig. 10 is a circuit diagram of a speaker unit according to an embodiment of the invention.

Wherein, the reference numbers:

1 Horn device

2 Intelligent mobile phone

10 speaker

101 hollow base

102 cover body

11 inner cavity

111 first chamber

112 second cavity

12 first sound outlet

13 second sound outlet

20 horn unit

21 diaphragm

22 overhanging fringe

23 magnetic body

24 voice coil

241 first group of coils

242 second set of coils

25 support

26 yoke iron

G magnetic gap

30 bass reinforcement unit

31 bass reflex tube

32 passive radiator

33 driven diaphragm

Region E

Curve C1-C4

Detailed Description

Fig. 1 is a schematic application diagram of a speaker device according to an embodiment of the present invention, and fig. 2 is an exploded perspective view of the speaker device according to the embodiment of the present invention. As shown in fig. 1 and fig. 2, the speaker device 1 of the present embodiment includes a sound box 10, a speaker unit 20, and a bass reinforcement unit 30, wherein the speaker unit 20 and the bass reinforcement unit 30 are disposed inside the sound box 10. In one embodiment, the speaker device 1 may be a micro speaker for a thin or small electronic product (e.g., a smart phone, a tablet computer, or a notebook computer) with a small internal space. For example, as shown in fig. 1, in the present embodiment, the speaker device 1 is disposed inside a smart phone 2 for emitting sound to be listened by surrounding people, but the present embodiment is not limited thereto.

As shown in fig. 2, in the present embodiment, the sound box 10 includes an inner cavity 11, in the present embodiment, the inner cavity 11 includes a first cavity 111 and a second cavity 112, that is, the inner cavity 11 is further divided into two cavities, the first cavity 111 has a first sound outlet 12, the second cavity 112 has a second sound outlet 13, wherein the first sound outlet 12 and the second sound outlet 13 are disposed on the same side of the sound box 10, but this is not limited, and the first sound outlet 12 and the second sound outlet 13 may also be disposed on different sides of the sound box 10. In addition, in the present embodiment, the sound box 10 includes a hollow base 101 and a cover 102, and in the manufacturing process, the speaker unit 20 and the bass reinforcement unit 30 can be installed in the hollow base 101 respectively, and then the cover 102 is covered and fixed on the hollow base 101, so that the speaker unit 20 and the bass reinforcement unit 30 are fixed in the first cavity 111 and the second cavity 112 respectively.

As shown in fig. 2 and fig. 3, the cavity volume V of the inner cavity 11 of the sound box 10 of the present embodiment is between 0.5 ml and 1 ml, so as to be suitable for thin or small electronic products with small internal space. In some embodiments, the chamber volume V may be the net volume of the second chamber 112 of the inner chamber 11, i.e., the volume excluding other elements (e.g., the bass reinforcement unit 30) inside the second chamber 112.

In summary, the sound box 10 has a cavity acoustic compliance value Cab, where the cavity acoustic compliance value Cab is a product of a cavity volume V divided by an air density ρ and a sound velocity c squared, that is, a calculation formula of the cavity acoustic compliance value Cab is Cab ═ V/ρ c²Where V is the cavity volume of the inner cavity 11 and ρ is the air density (about 1.29 Kg/m)³) And c is the speed of sound (about 343 m/s). As can be seen from the above calculation formula, the cavity acoustic compliance value Cab and the cavity volume V are in positive correlation with each other, in other words, the smaller the cavity volume V, the smaller the cavity acoustic compliance value Cab of the sound box 10 is.

As shown in fig. 2 and fig. 3, the speaker unit 20 corresponds to the first sound outlet 12 of the sound box 10 and can be fixed inside the sound box 10 by gluing, locking or fastening, and in this embodiment, the speaker unit 20 faces the inside of the first cavity 111 instead of the first sound outlet 12, but this is not limited. In another embodiment, as shown in fig. 4, the speaker unit 20 may also be directly facing the first sound outlet 12 to output sound from the first sound outlet 12. As shown in fig. 4, in an embodiment, the speaker unit 20 may be a moving-coil speaker and includes a diaphragm 21, a suspension 22(surround), a magnet 23, a voice coil 24, a bracket 25, and a yoke 26. The magnetic body 23 is made of a magnetic conductive material and is combined with the yoke 26, the yoke 26 has an annular magnetic gap G, the voice coil 24 is wound in the magnetic gap G of the yoke 26 and is adjacent to the magnetic body 23, and the voice coil 24 is not in contact with the yoke 26 and is connected with the diaphragm 21, so that the voice coil 24 can drive the diaphragm 21 to vibrate synchronously when moving. The suspension edge 22 is disposed around the diaphragm 21 and connected between the diaphragm 21 and the support 25. Therefore, when current passes through the voice coil 24, an alternating magnetic field change is generated, and magnetic lines of force are cut in the magnetic gap G to generate a lorentz force which changes along with time so as to drive the voice coil 24 to move, so that the diaphragm 21 connected to the voice coil 24 vibrates simultaneously, and sound waves are generated and transmitted from the first sound outlet 12 through air. In some embodiments, the suspension edge 22 may be made of an elastic material, such as rubber, polypropylene, or a thermoplastic elastomer, and the suspension edge 22 has good elasticity and toughness, so that when the diaphragm 21 vibrates, the suspension edge 22 can generate uniform deformation and stress, so that the movement of the diaphragm 21 is more flexible, and better sound quality is generated.

As shown in fig. 2 and fig. 4, the bass reinforcement unit 30 corresponds to the second sound outlet 13 of the sound box 10, and the bass reinforcement unit 30 can be fixed inside the second cavity 112 by means of adhesion, locking, or clipping. In the present embodiment, the bass reflex reinforcement unit 30 includes a bass reflex tube 31 to form the sound box 10 as a bass reflex sound box (bass reflex enclosure). The bass reflex tube 31 is an open type tube, that is, two ends of the bass reflex tube 31 are not sealed, and one end of the bass reflex tube 31 is located at the second sound outlet 13, and the other end is communicated with the second cavity 112 of the sound box 10. In some embodiments, the bass reinforcement unit 30 can also be disposed outside the sound box 10 and communicate with the second cavity 112, and the embodiment is not limited thereto.

In addition, as shown in fig. 2 and 3, the bass reflex tube 31 can output a low frequency response frequency according to the operation of the speaker unit 20, so as to enhance the sound pressure of the speaker device 1 in the low frequency band. For example, the low frequency response of bass reflex tube 31 is calculated as

Where f is the low frequency response frequency, c is the sound velocity (about 343m/s), a is the cross-sectional area of the bass reflex tube 31, V is the cavity volume of the inner cavity 11 of the sound box 10, and L is the length of the bass reflex tube 31. In one embodiment, the cross-sectional area A of bass reflex tube 31 is assumed to be 0.636mm²The length L of the bass reflex tube 31 is 5mm, the cavity volume V of the inner cavity 11 is 700mm ^3, and the calculation formula is substituted to obtain the low frequency response frequency f of 735.7Hz, that is, the bass reflex tube 31 can generate the low frequency response frequency f of 735.7Hz during the operation of the speaker unit 20, so as to enhance the speaker device 1 to 735.And low-frequency band sound pressure around 7 Hz.

In another embodiment, as shown in fig. 5, the bass reinforcement unit 30 may also include a passive radiator 32(passive radiator), where the passive radiator 32 and the speaker unit 20 are respectively disposed at two opposite sides of the inner cavity 11, and the passive radiator 32 includes a driven diaphragm 33, and when the speaker device 1 operates to vibrate the diaphragm 21 to generate sound, the driven diaphragm 33 may generate low-frequency resonance through air to generate a low-frequency response frequency to reinforce the sound pressure of the speaker device 1 at the low frequency band.

As shown in fig. 4, the horn unit 20 has a horn acoustic compliance value Cas and an effective sound output area S, the horn acoustic compliance value Cas is the product of a mechanical compliance value Cms of the suspension edge 22 and the square of the effective sound output area S, that is, the horn acoustic compliance value Cas is calculated as Cas-Cms × S²Where Cms is a mechanical compliance value of the suspended edge 22 and S is the effective sound output area. The effective sound emitting area S is proportional to the area of the diaphragm 21 or the aperture of the speaker unit 20, in other words, the larger the area of the diaphragm 21 or the aperture of the speaker unit 20 is, the larger the effective sound emitting area S is. The mechanical compliance value Cms of the suspended edge 22 represents compliance of the suspended edge 22, for example, a larger mechanical compliance value Cms represents a larger compliance (smaller rigidity) of the suspended edge 22, and a smaller mechanical compliance value Cms represents a smaller compliance (larger rigidity) of the suspended edge 22. As can be seen from the above calculation formula, the horn acoustic compliance value Cas and the mechanical compliance value Cms of the suspended edge 22 are positively correlated with each other, in other words, the smaller the mechanical compliance value Cms of the suspended edge 22, the smaller the horn acoustic compliance value Cas.

In addition, in the horn device 1 of the embodiment of the present invention, the ratio of the horn acoustic compliance value Cas of the horn unit 20 to the cavity acoustic compliance value Cab of the sound box 10 is further adjusted to be less than or equal to 1 (i.e., Cas/Cab ≦ 1), so that when the bass reinforcement unit 30 is applied to the sound box 10 with a small inner cavity 11 (for example, an inner cavity 11 having a cavity volume V between 0.5 ml and 1 ml), the bass reinforcement unit 30 is ensured to play a role of enhancing the sound pressure in the low frequency range, and the output performance of the horn device is enhanced.

In detail, the speaker device 1 is applied to a thin or small electronic product having a small internal spaceThe cavity volume V is relatively small (mostly between 0.5 ml and 1 ml), and therefore, the cavity acoustic compliance value Cab is also reduced (since Cab is V/ρ c)²). Therefore, in an embodiment of the present invention, the mechanical compliance value Cms of the suspension edge 22 is reduced to reduce the horn acoustic compliance value Cas of the horn unit 20 (since Cas is Cms × S)²) And enabling the horn acoustic compliance value Cas to be less than or equal to the cavity acoustic compliance value Cab, so that the ratio of the horn acoustic compliance value Cas to the cavity acoustic compliance value Cab is adjusted to be less than or equal to 1.

In one embodiment, the compliance value Cms of the suspended edge 22 may be adjusted to be between 0.12mm/N and 1.2mm/N, for example, by adjusting the shape or material of the suspended edge 22 to reduce the compliance value Cms. For example, a material with a higher hardness may be used for the suspension edge 22 to increase the rigidity of the suspension edge 22, so that the compliance of the suspension edge 22 is reduced to decrease the mechanical compliance value Cms. Alternatively, in other embodiments, the mechanical compliance value Cms may be reduced by texturing the suspended edge 22 or increasing the thickness of the suspended edge 22 to increase the rigidity of the suspended edge 22. For example, as shown in the following table one, in the present embodiment, the cavity volume V of the inner cavity 11 is 0.7 ml, the mechanical compliance value Cms of the suspension edge 22 is adjusted to 0.75mm/N, and the effective sound emitting area S of the speaker unit 20 is 81mm²The above values are substituted into a calculation formula of the cavity acoustic compliance value Cab (Cab ═ V/ρ c)²) And calculation formula of horn acoustic compliance value Cas (Cas ═ Cms × S)²) And calculating the ratio of the horn acoustic compliance value Cas to the cavity acoustic compliance value Cab, and obtaining the ratio of about 0.98.

Watch 1

Parameter(s)	Numerical value	Unit of
			Cms	0.75	mm/N
S	81	mm²
			V	0.7	cc
ρ	1.29	kg/m³
			c	343	m/s
M	88	mg
			Fc(Fh)	872.6	Hz

As shown in fig. 6, a sound pressure-frequency curve of the loudspeaker device 1 is actually tested after a ratio of the loudspeaker acoustic compliance value Cas of the loudspeaker unit 20 to the cavity acoustic compliance value Cab of the sound box 10 is adjusted to be less than or equal to 1 in the embodiment of the present invention. As can be seen in this figure, the horizontal axis represents frequency (Hz), the left vertical axis represents sound pressure (dB), wherein the curve C1 represents a sound pressure-frequency curve generated by using a closed type sound box in the past, and the curves C2 to C4 represent a sound pressure-frequency curve generated by the speaker device 1 according to the embodiment of the present invention (the cavity volume V of the inner cavity 11 of the sound box 10 is between 0.5 ml and 1 ml, and the ratio of the speaker acoustic compliance value Cas to the cavity acoustic compliance value Cab is adjusted to be 1 or less). Curve C2 illustrates the length L of bass reflex duct 31 as 4mm, curve C3 illustrates the length L of bass reflex duct 31 as 6mm, and curve C4 illustrates the length L of bass reflex duct 31 as 10 mm. As is apparent from comparison between the curves C1 and C4, in the embodiment of the present invention, after the ratio between the horn acoustic compliance value Cas and the cavity acoustic compliance value Cab is adjusted to be equal to or less than 1, even in the horn device 1 with a small sound box 10, the bass reinforcement unit 30 can smoothly exert the function of reinforcing the sound pressure in the low frequency band, for example, in this figure, the sound pressures in the sections of the curves C2 and C4 from about 400Hz to 700Hz are significantly greater than the sound pressure in the curve C1.

The adjustment of the mechanical compliance value Cms of the suspension edge 22 will relatively result in an increase of the resonant frequency fc (fh) of the horn unit 20. Therefore, in an embodiment of the present invention, in order to reduce the resonant frequency of the horn unit 20 to maintain the resonant frequency within the predetermined range, the vibration mass M of the horn unit 20 may be increased, for example, by adjusting the vibration mass M in inverse proportion to the mechanical compliance value Cms, i.e., the vibration mass M is adjusted to be larger as the mechanical compliance value Cms is adjusted to be smaller. In one embodiment, the vibration mass M is a sum of masses of at least one vibration element (e.g., the diaphragm 21, the suspension 22, or the voice coil 24) inside the speaker unit 20 when the speaker unit 20 operates.

Bearing, the resonant frequency F of the horn unit 20_c(F_h) The relation of the mechanical compliance value Cms and the vibration mass M is

Wherein F_c(F_h) Is the resonant frequency of the horn unit 20, M is the vibrating mass, C_ATIs the acoustic compliance of the horn system. In addition, the horn system acoustic compliance C in the above equation_ATThe relation between the acoustic compliance value Cas of the horn and the acoustic compliance value Cab of the cavity is

From the above relationIt can be seen that the smaller the mechanical compliance value Cms is adjusted, the smaller the horn acoustic compliance value Cas and the horn system acoustic total compliance C are_ATThe smaller the resonance frequency F of the horn unit 20_c(F_h) It is possible to increase, therefore, the vibration mass M of the speaker unit 20 by increasing the vibration mass M of the speaker unit 20, for example, by increasing the weight of the voice coil 24 or the diaphragm 21, thereby lowering the resonance frequency F of the speaker unit 20_c(F_h) To within a predetermined resonant frequency range.

As shown in the table one, in an embodiment of the present invention, assuming that the predetermined resonant frequency range of the horn unit 20 is between 870Hz and 875Hz, when the mechanical compliance value Cms of the suspension edge 22 is adjusted to 0.75mm/N, and the ratio of the horn acoustic compliance value Cas to the cavity acoustic compliance value Cab is 0.98, the vibration mass M of the horn unit 20 can be adjusted to 88mg, so as to adjust the resonant frequency F of the horn unit 20 to be within the range of 870Hz to 875Hz_c(F_h) Is 872.6Hz and is maintained within a predetermined resonance frequency range.

Accordingly, the sound pressure output from the horn unit 20 is slightly reduced by increasing the vibration mass M of the horn unit 20. Accordingly, as shown in fig. 7 and 8, fig. 8 is a partially enlarged view of the region E of fig. 7. In this embodiment, the voice coil 24 is divided into two sets of coils (e.g. the first set of coils 241 and the second set of coils 242), wherein the number of turns of the first set of coils 241 and the second set of coils 242 may be the same or different. In addition, in the present embodiment, the first group of coils 241 and the second group of coils 242 are further connected in parallel, as shown in fig. 9 and fig. 10, in the present embodiment, the first group of coils 241 is disposed around the second group of coils 242, and the first group of coils 241 and the second group of coils 242 are electrically connected to the power supply respectively to achieve a parallel connection mode. However, the above embodiments are only examples, and in other embodiments, the first group of coils 241 and the second group of coils 242 may also be interlaced with each other (e.g. interlaced with each other or wound around each other), and illustration is omitted in this embodiment.

Therefore, in the embodiment of the present invention, the voice coil 24 is divided into the first group of coils 241 and the second group of coils 242, and the coils are connected in parallel, so that the total resistance value of the voice coil 24 can be reduced, the force factor can be improved, and the sound pressure output by the speaker device 1 can be improved. In detail, the relationship between the force factor and the lorentz force is F-iBL, where F is the lorentz force, i is the current, B is the magnetic field strength, L is the total length of the voice coil 24, and the force factor is the product of the magnetic field strength B and the total length L of the voice coil 24, so that when the speaker device 1 is in operation, the lorentz force generated by the current magnetic effect is the product of the current i and the force factor BL, and therefore, the larger the force factor or the current i is, the larger the lorentz force can be generated, and the sound pressure output by the speaker device 1 can be increased.

For example, referring to the following table two and fig. 10, by dividing the voice coil 24 into the first group of coils 241 and the second group of coils 242 and connecting them in parallel, compared to the conventional non-parallel connection of the voice coil 24, the total resistance (Rtotal) of the voice coil 24 can be greatly reduced, and the total current value and the force factor can be relatively increased, so as to increase the sound pressure output by the speaker device 1. In some embodiments, voice coil 24 may be split into two or more sets of coils and connected in parallel to each other to further reduce the total resistance of voice coil 24 and increase sound pressure.

In some embodiments, the appropriate force factor may also be generated by adjusting the ratio of the number of windings of voice coil 24 to the coil cross-sectional area. For example, as shown in the following table two, in a fixed winding space, the cross-sectional area of the voice coil 24 can be adjusted to be smaller as the number of windings of the voice coil 24 is larger, that is, the number of windings of the voice coil 24 is adjusted to be inversely proportional to the coil cross-sectional area, so as to adjust and generate the optimal resistance value and the optimal coil length in the fixed winding space, thereby obtaining the optimal lorentz force, and thus being suitable for different product or functional requirements.

Watch two

The present invention is capable of other embodiments, and various changes and modifications may be made by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. A horn device, comprising:

a sound box, comprising an inner cavity, wherein a cavity volume of the inner cavity is between 0.5 ml and 1 ml, and the sound box has a cavity acoustic compliance value, and the cavity acoustic compliance value is the product of the cavity volume divided by an air density and a sound velocity square;

the loudspeaker unit is arranged in the inner cavity and comprises a vibrating diaphragm and a hanging edge, the hanging edge is arranged around the vibrating diaphragm in a surrounding mode, the loudspeaker unit is provided with a loudspeaker acoustic compliance value and an effective sound output area, the loudspeaker acoustic compliance value is the product of a mechanical compliance value of the hanging edge and the square of the effective sound output area, the effective sound output area is in direct proportion to the area of the vibrating diaphragm, and the ratio of the loudspeaker acoustic compliance value to the cavity acoustic compliance value is smaller than or equal to 1; and

and the bass strengthening unit is communicated with the inner cavity and outputs a low-frequency response frequency according to the operation of the loudspeaker unit.

2. The speaker device as claimed in claim 1, wherein the internal cavity comprises a first cavity and a second cavity, the first cavity has a first sound outlet, the second cavity has a second sound outlet, the speaker unit corresponds to the first sound outlet, the bass reinforcement unit comprises a bass reflex tube, and the bass reflex tube corresponds to the second sound outlet.

3. The speaker unit of claim 1, wherein the bass reinforcement unit includes a passive radiator including a driven diaphragm that vibrates in response to operation of the speaker unit.

4. The horn apparatus of claim 1, wherein the mechanical compliance of the overhang is between 0.12mm/N and 1.2 mm/N.

5. The horn apparatus of claim 1, wherein the horn unit further comprises a vibrating mass, the vibrating mass being a sum of masses of at least one vibrating member inside the horn unit, the vibrating mass being inversely proportional to the mechanical compliance of the suspended edge to maintain the horn unit in a resonant frequency range.

6. The horn apparatus of claim 5, wherein the at least one vibrating member comprises the diaphragm and the suspension.

7. The speaker device as claimed in claim 1, wherein the speaker unit comprises a magnetic body and a voice coil disposed adjacent to the magnetic body and including a first set of coils and a second set of coils, the first set of coils and the second set of coils being connected in parallel with each other.

8. The speaker device as claimed in claim 7, wherein a number of winding turns of the voice coil is inversely proportional to a coil sectional area.

9. The horn apparatus of claim 7, wherein the first set of coils surrounds the second set of coils.

10. The horn apparatus of claim 7, wherein the first set of coils and the second set of coils are interwoven with each other.